# 📜 What is DN-404 DN-404 refers to an open source implementation that allows creating a hybrid ERC-20/ERC-721 token. Key points: * It uses two contracts - an ERC-20 "base" token and a "mirror" ERC-721 NFT. * The ERC-20 handles most trading and tracks balances. It mints/burns the ERC-721s based on thresholds. * The ERC-721 acts as a standard NFT, compatible with existing protocols. * This allows fractional trading of NFTs natively on DEXes via the ERC-20, while still being able to use the ERC-721 on NFT marketplaces. * Provides native fractionalization and increased liquidity for NFT projects. In summary, it's an innovative implementation to create hybrid fractional NFTs with liquidity on both DEXes and NFT platforms. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://rekt-frens.gitbook.io/rekt-frens-documentation/overview/what-is-dn-404.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.